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15. Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash $ 159 $ 958 $ 1
Receivables 573 0  
Carrying amount      
Cash 159 958  
Receivables 573 0  
Accounts Payable 15 26  
Debt 9,670 9,670  
Fair value      
Cash 159 958  
Receivables 573 0  
Accounts Payable 15 26  
Debt $ 0 $ 0